- connect(overlay, SIGNAL(destroyed()), this, SLOT(overlayDestroyed()));
- connect(overlay, SIGNAL(hasChanged()), this, SLOT(invalidate()));
+ connect(overlay, &QObject::destroyed, this, &BufferViewOverlayFilter::overlayDestroyed);
+ connect(overlay, &BufferViewOverlay::hasChanged, this, &QSortFilterProxyModel::invalidate);